The Influence of Diversion Project on the Concentration of Nitrogen and Phosphorus in Wenruitang River

The diversion project is an important measure to improve the ecological environment of Wenruitang River.However,the water from Ou River brings a large quantity of suspended sediments.Therefore,simulated experiments are conducted to study the influence of suspended sediments on kinetic absorption characteristics and purification effect of nitrogen and phosphorus in river water.The results indicate that the kinetic adsorption effect of nitrogen and phosphorus in the river water by suspended sediments is not obvious.In the mix water which the concentration of suspended sediments is 0.5 kg/m3,the net adsorption ratio of nitrogen and phosphorus is only 5.9% and 2.5%,respectively.While during the process of sediment deposition,suspended sediments can carry a certain amount of total nitrogen and total phosphorus out of the water,but the influence of absorbing dissolved nitrogen and phosphorus in the water is small.